|This article is about a/an villain in Kamen Rider Build.|
Behind the Scenes
As with the real Akaba, he is portrayed by Eishin (栄信).
- Castle Lost Smash holds the dubious honor of only appearing as an imitation, since the actual Lost Bottle at that time is in Grease's possession.
- In the series proper, Evolto almost succeeded in transforming Sento Kiryu into the Castle Lost Smash, until the Genius Fullbottle saved him.
- According to the official website of Kamen Rider Build, an actual Castle Lost Smash has the same firepower as the Fullbottle Buster.